The HTG design combines the superior sealing performance of a premium oxidation inhibited grade flexible graphite with an exceptional oxidation barrier in mica/phyllosilicate. The combination of these two sealing materials allows the user to eliminate the effects of oxidation at extreme temperatures. MLSE HTG family of products are the most stable and impermeable gasket materials available for extreme temperatures. The overall effective rating of the HTG configuration can go to a MAX of 1500°F.